/**
 * @param letter
 * @param beforeLetter
 * @param line
 * @param column
 * @returns (String)
 */
function LexicalException(letter, beforeLetter, line, column) {
	
	var message = "Invalid character (\"" + letter + "\") at line "
				+ line + " and column " + column
				+ " after character \"" + dotScript.charAt(i - 1)
				+ "\"";
	
	if (beforeLetter != undefined && beforeLetter != null)
		message += " and before character \""
			+ dotScript.charAt(i + 1) + "\"";
	
	return message;
}